// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2016
// Mehdi Goli    Codeplay Software Ltd.
// Ralph Potter  Codeplay Software Ltd.
// Luke Iwanski  Codeplay Software Ltd.
// Contact: <eigen@codeplay.com>
// Benoit Steiner <benoit.steiner.goog@gmail.com>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

#define EIGEN_TEST_NO_LONGDOUBLE
#define EIGEN_TEST_NO_COMPLEX
#define EIGEN_DEFAULT_DENSE_INDEX_TYPE int64_t
#define EIGEN_USE_SYCL

#include "main.h"
#include <unsupported/Eigen/CXX11/Tensor>

using Eigen::array;
using Eigen::SyclDevice;
using Eigen::Tensor;
using Eigen::TensorMap;

using Eigen::RowMajor;
using Eigen::Tensor;
template<typename DataType, int DataLayout, typename IndexType>
static void
test_image_op_sycl(const Eigen::SyclDevice& sycl_device)
{
	IndexType sizeDim1 = 245;
	IndexType sizeDim2 = 343;
	IndexType sizeDim3 = 577;

	array<IndexType, 3> input_range = { { sizeDim1, sizeDim2, sizeDim3 } };
	array<IndexType, 3> slice_range = { { sizeDim1 - 1, sizeDim2, sizeDim3 } };

	Tensor<DataType, 3, DataLayout, IndexType> tensor1(input_range);
	Tensor<DataType, 3, DataLayout, IndexType> tensor2(input_range);
	Tensor<DataType, 3, DataLayout, IndexType> tensor3(slice_range);
	Tensor<DataType, 3, DataLayout, IndexType> tensor3_cpu(slice_range);

	typedef Eigen::DSizes<IndexType, 3> Index3;
	Index3 strides1(1L, 1L, 1L);
	Index3 indicesStart1(1L, 0L, 0L);
	Index3 indicesStop1(sizeDim1, sizeDim2, sizeDim3);

	Index3 strides2(1L, 1L, 1L);
	Index3 indicesStart2(0L, 0L, 0L);
	Index3 indicesStop2(sizeDim1 - 1, sizeDim2, sizeDim3);
	Eigen::DSizes<IndexType, 3> sizes(sizeDim1 - 1, sizeDim2, sizeDim3);

	tensor1.setRandom();
	tensor2.setRandom();

	DataType* gpu_data1 = static_cast<DataType*>(sycl_device.allocate(tensor1.size() * sizeof(DataType)));
	DataType* gpu_data2 = static_cast<DataType*>(sycl_device.allocate(tensor2.size() * sizeof(DataType)));
	DataType* gpu_data3 = static_cast<DataType*>(sycl_device.allocate(tensor3.size() * sizeof(DataType)));

	TensorMap<Tensor<DataType, 3, DataLayout, IndexType>> gpu1(gpu_data1, input_range);
	TensorMap<Tensor<DataType, 3, DataLayout, IndexType>> gpu2(gpu_data2, input_range);
	TensorMap<Tensor<DataType, 3, DataLayout, IndexType>> gpu3(gpu_data3, slice_range);

	sycl_device.memcpyHostToDevice(gpu_data1, tensor1.data(), (tensor1.size()) * sizeof(DataType));
	sycl_device.memcpyHostToDevice(gpu_data2, tensor2.data(), (tensor2.size()) * sizeof(DataType));
	gpu3.device(sycl_device) = gpu1.slice(indicesStart1, sizes) - gpu2.slice(indicesStart2, sizes);
	sycl_device.memcpyDeviceToHost(tensor3.data(), gpu_data3, (tensor3.size()) * sizeof(DataType));

	tensor3_cpu = tensor1.stridedSlice(indicesStart1, indicesStop1, strides1) -
				  tensor2.stridedSlice(indicesStart2, indicesStop2, strides2);

	for (IndexType i = 0; i < slice_range[0]; ++i) {
		for (IndexType j = 0; j < slice_range[1]; ++j) {
			for (IndexType k = 0; k < slice_range[2]; ++k) {
				VERIFY_IS_EQUAL(tensor3_cpu(i, j, k), tensor3(i, j, k));
			}
		}
	}
	sycl_device.deallocate(gpu_data1);
	sycl_device.deallocate(gpu_data2);
	sycl_device.deallocate(gpu_data3);
}

template<typename DataType, typename dev_Selector>
void
sycl_computing_test_per_device(dev_Selector s)
{
	QueueInterface queueInterface(s);
	auto sycl_device = Eigen::SyclDevice(&queueInterface);
	test_image_op_sycl<DataType, RowMajor, int64_t>(sycl_device);
}

EIGEN_DECLARE_TEST(cxx11_tensor_image_op_sycl)
{
	for (const auto& device : Eigen::get_sycl_supported_devices()) {
		CALL_SUBTEST(sycl_computing_test_per_device<float>(device));
#ifdef EIGEN_SYCL_DOUBLE_SUPPORT
		CALL_SUBTEST(sycl_computing_test_per_device<double>(device));
#endif
	}
}
